﻿#ifndef MD5_H
#define MD5_H
typedef struct
{
	unsigned int count[2];
	unsigned int state[4];
	unsigned char buffer[64];
} MD5_CTX;


#define F(x,y,z) ((x & y) | (~x & z))
#define G(x,y,z) ((x & z) | (y & ~z))
#define H(x,y,z) (x^y^z)
#define I(x,y,z) (y ^ (x | ~z))
#define ROTATE_LEFT(x,n) ((x << n) | (x >> (32-n)))
#define FF(a,b,c,d,x,s,ac) \
          { \
          a += F(b,c,d) + x + ac; \
          a = ROTATE_LEFT(a,s); \
          a += b; \
          }
#define GG(a,b,c,d,x,s,ac) \
          { \
          a += G(b,c,d) + x + ac; \
          a = ROTATE_LEFT(a,s); \
          a += b; \
          }
#define HH(a,b,c,d,x,s,ac) \
          { \
          a += H(b,c,d) + x + ac; \
          a = ROTATE_LEFT(a,s); \
          a += b; \
          }
#define II(a,b,c,d,x,s,ac) \
          { \
          a += I(b,c,d) + x + ac; \
          a = ROTATE_LEFT(a,s); \
          a += b; \
          }
void MD5Init(MD5_CTX* context);
void MD5Update(MD5_CTX* context, unsigned char* input, unsigned int inputlen);
void MD5Final(MD5_CTX* context, unsigned char digest[16]);
void MD5Transform(unsigned int state[4], unsigned char block[64]);
void MD5Encode(unsigned char* output, unsigned int* input, unsigned int len);
void MD5Decode(unsigned int* output, unsigned char* input, unsigned int len);


class MD5Data
{
public:
	MD5Data();
	~MD5Data();
	const std::string& genMD5Bin();
	const std::string& genMD5();
	inline MD5Data& operator <<(const std::string& org)
	{
		if (!org.empty())
		{
			MD5Update(&_content, (unsigned char*) org.c_str(), (unsigned int)org.length());
		}
		return *this;
	}
	inline void append(const std::string& org)
	{
		if (!org.empty())
		{
			MD5Update(&_content, (unsigned char*)org.c_str(), (unsigned int)org.length());
		}
	}
private:
	MD5_CTX _content;
	std::string _bin;
	std::string _string;
};

#endif

